He was the first to propose unifying hypothesis of species.
He hypothesised about an aquired trait
an aquired trait is one that is not determined by genes. instead, it arises during an organism's lifetime as a result of the organism's experience or behavior
Lamarck made a study of habits and physiology of shore birds.
His hypothesis was attacked by scientist who rejected the idea of evolution itself.
His ideas were later disapproved
Lamarck was the first to clearly state that types of organsisms change over time and that new types of organsisms are modified descendants of older types.
this idea was presented more convincingly more than 50 years later by Charles Darwin.
In the mid 1800's both Charles Darwin and Alfred Wallas independently proposed the hypothesis that species were modified by natural selection.
Natural Selection- Organisms best suited to their enviorment reproduce more successfully than other organisms.
Lamarck's Explanation